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Melagabbro

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A gabbro with an M' colour index of greater than 65.


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Classification of MelagabbroHide

Gabbro is in section 10 of the QAPF diagram.

Mineralogy of MelagabbroHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > PlagioclaseA petrological term for Albite-Anorthite Series.
Mafic mineralsA petrological term for dark, rock-forming minerals rich in magnesium and/or iron.
Silica > QuartzSiO2
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Amphibole > HornblendeAn informal name for dark green to black amphiboles, mostly ferro-hornblende or ...
Mica > BiotiteA series or subgroup of the Mica Group.

References for MelagabbroHide

Reference List:
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Le Maitre (ed.) (2002) Igneous Rocks - A Classification and Glossary of Terms. Cambridge Press

Internet Links for MelagabbroHide

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